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Juiy 8, 1941. J. J|N ow 2248,59]

CALENDAR Filed April 22, 1959 25 CENTURY-@ lOEX Z/Z- I INVENTOR- TuN T:N SOMI.

ATTORNEY- Patented July 8, 1941 OFFICE Jung JinQSofW, Vancouver,British: Columbia,

Canad ApplicationApril '22, 19saseri 1 No. 269,363 1 Claim. (01. 40;113)' My invention relates. to improvementsinjc alendars of theso-called' perpetual type. The objects of the invention are to provide acalendar in which any month of any. Year within the scope of thecalendar may be displayed; to provide a calendar covering the periodfrom1 B. C. to 9999 A. D. in a small compass, say five or six inches square,where every character may be read without artificial aid by a person ofnormal eyesight; to provide a calendar which will give accurateinformation according to the Julian which was in force up to October 5,1582, and the Gregorian calendar which'has been in force ever since,also to provide a] calendar which will accurately indicate all leapyears and all common years during that time accounting for such centuryyears as 1700 1800 and 1900 which were regarded as common years.

The invention consists of a front panel having a vertical row of viewingopenings and a plurality of charts rotatably mounted behind said panel,which are provided with characters indicative of centuries, years,months and days, and indexes which added together indicate the positionto which one of the charts must be moved to show the day of the monthsought, as will be more fully described in the following specificationand shown in the accompanying drawing, in which:

Figure l is a part elevational view of the invention.

Figure 2 is a front view of the several charts disposed behind the frontpanel.

Figure 3 is a sectional view taken on the line 3-3 of Figure 2.

In the drawing like characters of reference indicate corresponding partsin each figure.

The numeral l indicates generally a front panel, see Figures 1 and 3,suitably bound by a rim 2 which also supports a rear panel 3. Rotatablymounted on an axis extending through the rear panel 3 are charts 4, 5and 6, and mounted on an axis extending through the front panel I arecharts 1 and 8. The chart 6 is provided with a pivot pin 9 and a knobIt). A sleeve l l is journaled upon the pivot pin 9 and is fitted at oneend with a knob l2 and supports the chart 5 at its inner end. The chart4 is secured to a sleeve [3 which is journalled within the rear panel 3and upon the sleeve H and this sleeve is fitted with a knob M. The chart8 is fitted with a sleeve [5 extending through the front panel I and isfitted with a knob l6 and concentrically mounted in the sleeve i5 is apivot pin I! to which the chart I is secured and which also is providedwith a. turning knob I8.

The front. panel I is provided with a plurality of viewing openings;which are vertically aligned along thecentre of the panel and arerespectively numbered 19,20, 2l',"22, 23, 2A and and areauaptedft'oiexpose to view, in the above order, a Cehtu number, such as69 for the century 6900, Yet bers'uch as 06, the month and the. numaystherein, such as June days, the jo-,th,mor ith 1 to 30, thepweek index,the

th andYear index and the Century index. The chart '4'is' provided withcircularr'ows of figures 33 nd' 3"l,"thefigures' 3%) representingcenturynurnb from which are selectively displayed in .theofienihg' l9".These numbers are displayed "n two colours, such as red and black, butfor the purpose of identification in the drawing, the red numbers aref'ollo'wed by a dot. Those numbers wh" hare shown with ad'ot representthe centuries of. the Julian calendar and the centuries in whichZev'e'ry'fourth" year is a leap year. Inthe centre portion of chart 5are 9 rows of concentrically arranged index numbers 32 any one of whichmay be brought into display in the Month and Year opening 24 of thefront panel I. At the periphery of chart 5 are three concentric rowsindicated respectively by 33, 34 and 35. In the row 33 year numbers 0 to99 are displayed, every fourth year being shown with a dot to representleap year. Radially inward beneath each year number in row 34 is thenumber of days in the year represented or the word leap and in row 35registering with the word leap is the number 366 representing the daysof that year.

Chart 6 is provided with segments 35 each of which bear the name of amonth and the number of days in the month, such as June 30 days and anyof the segments may be brought into register with the Month opening 2|of the front panel I. Disposed radially of the chart 6 are pairs ofspaced lines 37 between each of which a small opening 38 is formed. Theseveral openings 38 are variously spaced from the centre of the chartand are each of such size as to expose one number only of one of therows 32 on chart 5.

Charts 1 and 8 are both mounted eccentrically to the charts 4, 5 and 6and both are segmental, consequently the indicia carried by the chart Ican be of substantial size for convenient display. The chart 1 isprovided with seven concentric rows of numbers 46, which numbers rangefrom 1 to 31 and are repeated in a predetermined order three times. Asegment of the rows 40 consists generally of seven numbers to a row tobe displayed in the opening 22.

Bordering the upper margin of the week day opening 22 of the front panelI is a line of words 4| representing the days of the week, which readwith the proper numbers displayed in the opening 22 showing the day ofany month date desired.

The chart 8 is substantially semi-circular and is stopped at itsperiphery to three different radii as at 42, 43 and 44, each of thesesteps being adapted to cover a portion of one of the lower rows 40 ofnumbers upon the chart 1 and to leave exposed in the opening 22 only the28, 29, 30 or 31 days of the month sought, as indicated in the monthopening 2|. An arcuate slot 46 is formed in the chart 8 which overlies aportion of a row of index numbers 41 which are displayed upon the chart1, and which are so spaced from the aXis of the chart that any one ofthem may be brought into register with the Week index opening 23.

To find the days of say the month of June of the year 6906, the chart 4is turned to expose the century number 69 in the Century opening l9,which automatically exposes in the Century index opening 25 the centuryindex 4. Next chart 5 is turned to expose 06 and 365 in the year opening20, the figures thus far found are in black or not afiixed by a dot,consequently they refer to a common year as indicated by the number ofdays, viz, 365. The above disposition of the year 06 brings into linewith the Month and Year opening the numerals 6, 5, 4, 3, 2, 1, 7, 4 and1, reading down. The chart 6 is then turned to expose June 30 days inthe Month opening 2|, which brings one pair of lines 31 within the Monthand Year index opening 24. The opening 38 between this pair at lines isspaced one row down from the centre of the chart 6 and consequentlyexposes the number 5, indicated on Figure2 by a dotted circle X. We nowhave exposed in the openings 25 and 24 two indexes 4 and 5 the sum ofwhich is 9, hence we turn the chart 1 until the index number 9 of therow 41 until said index 9 is displayed in the Week Day opening 22, then,since June is shown as having 30 days only, we turn the chart 8 untilthe second step 43 of said chart obscures the number 31. This completesthe operation and shows the month to begin on Tuesday and end onWednesday.

If the setting of the month of January in a year indicated as a leapyear and the month year index exposed in opening 24 can be either 4 or3, then the index 3 must be added to the century index instead of thenumber 4, since the latter refers to a common year.

What I claim as my invention is:

i A calendar comprising a front panel having aligned viewing openings, aplurality of super imposed charts rotatably mounted behind said panel,three of said charts being rotatable about one axis and two of saidcharts being rotatable about a second axis, said second axis beingbetween the first named axis and the periphery of the first mentionedthree, charts two of the first mentioned three charts having charactersindicative of time periods andindexes relative to said characters, oneof said first mentioned charts having openings capable of selectiveregistration with a viewing opening of the panel adapted when soregistered to display an index of another of the first mentioned threecharts, the second mentioned two charts consisting of a chart havingrows of consecutive numbers representing the days of the month and anindex relative thereto representing a week index and a chart havingperipheral steps adapted to selectively obscure a portion of some of therows of consecutive numbers, said last mentioned chart having an arcuateslot in register with one of the viewing openings of the front panel forselectively exposing a week index number in said panel viewing opening.

JUNG JIN SOW.

